A Less-Dark Dark Theme

[lukeblevins]

Let's keep this short and simple. These are screenshots of something that has not been released to testers yet. Please let me know what you think, and what other themes you would want in the future.

PS: The darker DataGrid headers are a bug in the DataGrid which is likely out of my control.

[lukeblevins]

Also, apologies for no testing release recently, as I have been busy fixing bugs and with school.